eustis22
Performance depends on several factors. Temperature is one. How many membranes and their flow rate is another. I only have 3 of the 150gpd membranes and get lower performance that what you reported. I usually see 2% sap go to 5%. At the end of the season I saw 1.75% go to 4%. Mine is processing about 8 gallons of sap an hour, giving me 4 gallons of concentrate. I tried once to squeeze the sap a bit more (66% permeate to 33% concentrate) but it was really slow, I let it run overnight for 6 hours and it was only processing 5gph of sap. It took the 2% sap up to 6% though.
next year I'll buy 2 more membranes since that seems to increase processing rates.
also, about the RO soap. I did it a few times during the season when the trees froze up and I knew the RO was going to sit. If I go more than 2-3 days between using it, it starts to smell. The pail of RO soap is going to last me forever so I don't mind using it during the season.
2021: 28 taps. 18"x36" flat pan and dual natural gas burners.
2020: 31 taps. 3 full size steam table pans on a custom 6x water heater natural gas burner setup.
2019: 31 taps on silvers. Back porch gas cook top with 2 full size steam table pans. An amazing 14.9 gallons in my backyard!
2018: 22 taps on 9 silvers. Propane turkey fryer and full size steam table pan on electric stove. I made 4.25 gallons in my backyard!